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| | Crustacea |
 | | The appendages are basically biramous (protopod, endopod, exopod). | | | Isopoda- isopods or sowbugs, body flattened, no carapace, eyes sessile, first thoracic segment fused with the head, 1 pair of maxillipeds, 1 pair of gnathopods, 6 pairs of pereiopods, 5 pairs of flattened pleopods, 0-5 abdominal segments fused with the telson, 1 pair of uropods, over 4,000 species, mostly marine, also terrestrial, freshwater, many troglobits. | | | The trunk is primitively composed of many similar segments each with similar biramous appendages, more advanced groups have uniramous appendages, fewer segments that are more specialized or fused into distinct regions (thorax and abdomen), part of the thorax may be fused to the head (cephalothorax). |
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http://www.esg.montana.edu/dlg/aim/crustac/crustac.html
(1487 words)
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| | Biramous - Wikipedia, the free encyclopedia |
| | Each leg/gill structure will be paired with a second biramous structure on the other side of the body. | | | Biramous appendages are best known from trilobites where all the legs -- both on the head and the thorax -- are parts of biramous structures with a gill branching off above the leg. | | | These are most commonly branched into a gill and leg with a common root at a body segment. |
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http://en.wikipedia.org/wiki/Biramous
(128 words)
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| | Crustaceamorpha |
| | In the simplest condition, each segment of a crustacean posesses one pair of biramous appendages (see image, left). | | | Crustacean biramous appendages have a basal or first portion referred to as the protopod. | | | As you move away from the body on a biramous appendage you find a branch on the outside, the exopod (exo means outer), and a branch on the inside, the endopod (endo means inner). |
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http://www.ucmp.berkeley.edu/arthropoda/crustacea/appendages.html
(358 words)
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| | Geolan |
| | Carapace well developed, covering most of the thorax but never fused with more than four thoracic segments | | | Abdomen with 5 pairs of primitively biramous pleopods | | | Antennae primitively biramous and often with scale-like exopod |
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http://allserv.rug.ac.be/~tdeprez/Mysidacea/General/Pages/Systematic.html
(196 words)
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| | Nebalia Laboratory Exercise |
| | These consist of a long, robust basal article from which arise two slender rami. | | | Each has a large basal portion bearing three setose endites and two distal rami, one of which is the exopod, the other the endopod. | | | Segments 1-6 each bear a pair of pleopods whereas segment 7 has no appendages. |
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http://www.lander.edu/rsfox/310nebaliaLab.html
(1987 words)
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| | Exam II Rescheduled |
| | Morphologically similar structures repeated down length of body | | | Lost or modified on some segments of crustaceans -- some appendages uniramous, some biramous, some triramous in certain groups | | | Repeated, biramous appendages along entire length of body |
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http://www.life.umd.edu/classroom/zool210/jensen/2Lectures/lecture15.html
(565 words)
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| | Livid's Lividict - biramous |
| | 1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Biramous \Bi*ra"mous\, a. | | | 1 definition found From XDict English-Chinese Dictionary [xdict]: biramous 二支的 | | | 1 definition found From The Collaborative International Dictionary of English v.0.48 [gcide]: Biramous \Bi*ra"mous\, a. |
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http://www.lividot.org/lookup/biramous.html
(199 words)
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| | biramous - definition by dict.die.net |
| | biramous adj : resembling a fork; divided or separated into two branches; "the biramous appendages of an arthropod"; "long branched hairs on its legson which pollen collects"; "a forked river"; "a forked tail"; "forked lightning"; "horseradish grown in poor soil may develop prongy roots" [syn: bifurcate, branched, forked, pronged, prongy] |
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http://dict.die.net/biramous
(60 words)
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| | Morphology Lecture Notes 2. |
| | This trilobite appendage was fundamentally different from other biramous arthropod appendages. | | | To understand the comparative anatomy of arthropod legs it is useful to consider a generalized biramous arthropod limb, such as from a primitive crustacean, as a hypothetical model for the ancestral state. | | | To quote Boudreaux: “The trochanteral exite is so well developed in the legs of many species [of crustaceans] that it was the basis for the original concept that the biramous appendage was the original type for all arthropods. |
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http://www.agctr.lsu.edu/arthropodmuseum/morpholect.2.htm
(2530 words)
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| | [No title] |
| | The thoracic appendages are uniramous and leg-like and in some families the first pair are enlarged and chelate. | | | The overall first impression can be of two biramous leg-like appendages or of four backward-facing structures either like legs, like flattened or fan-shaped paddles, or as widely separated triangular small points. | | | The uropods of Isopoda are biramous (two-branched) and the basal piece (peduncle) may be short and squat or long and cylindrical. |
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http://lucidcentral.com/keys/lwrrdc/public/aquatics/adcrust/html/CRUS__I.htm
(463 words)
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| | Anne Davison - Dance |
| | Eager to examine the relationships between gender, movement and music, Biramous produced its first performance project, Making Cello, in 2003. | | | The two create improvised works that often involve the use of electric instruments, pre-recorded sounds and aleatoric techniques. | | | Her latest endeavour has been to connect cello and dance in the most intimate way possible. |
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http://www.annedavison.net/dance.htm
(297 words)
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| | More on Arthropod Morphology |
| | A number of arthropods that now apparently have uniramous appendages, such as spiders and scorpions, are descended from ancestors that had biramous appendages: appendages may be modified in such a way that one branch is lost or concealed. | | | Arthropods also have a hemocoel, an open body cavity in which blood flows and bathes the tissues and organs. | | | The outer branch is often a flattened gill, while the inner branch is often used for walking or modified for grasping, chewing, or reproduction. |
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http://www.ucmp.berkeley.edu/arthropoda/arthropodamm.html
(178 words)
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| | Speleonectes lucayensis |
| | Remipedes are believed to be the most primitive of living crustaceans. | | | All species have a pair of slender, cylindrical pre-antennal frontal processes. | | | Evolutionary Origins: The large number of trunk segments, each with similar, laterally directed, biramous, swimming appendages, plus a combination of the other characteristics necessitated the erection of a new crustacean class, the Remipedia (Yager, 1981). |
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http://www.tamug.tamu.edu/cavebiology/fauna/remipedes/S_lucayensis.html
(568 words)
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| | biramous - definition of biramous by the Free Online Dictionary, Thesaurus and Encyclopedia. |
| | biramous - resembling a fork; divided or separated into two branches; "the biramous appendages of an arthropod"; "long branched hairs on its legson which pollen collects"; "a forked river"; "a forked tail"; "forked lightning"; "horseradish grown in poor soil may develop prongy roots" | | | This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. | | | biramous - definition of biramous by the Free Online Dictionary, Thesaurus and Encyclopedia. |
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http://www.thefreedictionary.com/biramous
(130 words)
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| | American Zoologist: Morphogenesis and homology in arthropod limbs |
| | Finally, limbs can be multibranched; an example is a phyllopodous limb which has a flattened, paddle-like form with many lobes along both the medial and lateral margins. | | | However, the homology between the parts of multibranched, phyllopodous limbs and the parts of other limbs is unclear (e.g., see discussion in Hessler, 1982). | | | To understand the pathway of transformation from biramous to other limb morphologies, one would ideally map limb morphology onto an independent phylogeny. |
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http://www.findarticles.com/p/articles/mi_qa3746/is_199906/ai_n8833603
(1212 words)
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| | TRILOBITE TALES |
| | First, it suggests that within the schizoramid groups the biramous limb is primitive. | | | This is important because Darwin and others considered the biramous limb to be the key to the relationship. | | | Thus, the occurrence of biramous limbs in trilobites and crustaceans do not demonstrate close relationship. |
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http://www.susqu.edu/satsci/03-05-24/trilobite_tales.htm
(3100 words)
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| | The Rhynie Chert Fauna |
| | A section through the left mandible (Md) is also shown. | | | First antennae (antennules) have not been observed, but the second antennae are distinctive in that they are long and biramous (see inset right), with symmetrical multi-segmented rami - a feature seen in extant Onychura rather than Calmanostraca (Fayers and Trewin 2003). | | | The head appears to be rounded towards the anterior where it bears a conspicuous notch, possibly representing the position of the naupliar eye (see inset below). |
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http://www.abdn.ac.uk/rhynie/castracoll.htm
(1481 words)
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| | Crustacea, the Higher Taxa - Amphionidacea (Eucarida, Malacostraca) |
| | Uropods well developed, 1 pair, positioned ventrolaterally; rami present, exopod without diaresis; endopod without statocyst (check). | | | Antennae (antenna 2) biramous; exopod forming a scaphocerite (very large). | | | Peraeopods (legs) 6 pairs; biramous (exopods reduced in females); non-phyllopodous; undifferentiated (simple). |
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http://www.crustacea.net/crustace/www/amphion.htm
(110 words)
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| | Annelida |
| | In the present article the Annelida will be understood as comprehending the A. DISCOPHORA, and A. GEPHYREA, the first two being often placed together in the subclass Chaetopoda. | | | The first segment is modified, so as to form a head or snout, and has the eyes, tentacles, andc. | | | 1) is elongated, segmented, more or less cylindrical (certain tubicolous forms having two well-marked (regions), and almost universally furnished with uniramous or biramous bristlebearing feet (parapodia, Huxley). |
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http://www.1902-encyclopedia.com/A/ANN/annelida.html
(6221 words)
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| | Biramous |
| | These branches may have separate functions; in crustaceans, for instance, the inner branch of a leg is used for walking, while the outer branch may be paddle-shaped or feathery and often functions as a gill. | | | Arthropod appendages that are biramous have two branches, an outer branch and an inner branch. |
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http://cartage.org.lb/en/themes/Reference/dictionary/Metazoan/B/Biramous.html
(50 words)
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| | GEOL 331 Lectures 29-31: Arthropoda |
| | A telson into which a pair of biramous uropods are functionally incorporated. | | | Note: these remain biramous, even though the gills are typically enclosed by the carapace. | | | Eight pairs of thoracic appendages broken down into: |
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http://www.geol.umd.edu/~tholtz/G331/lectures/331arthr3.html
(908 words)
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| | Subfamily Mysinae |
| | Thoracic endopods 3-8 with undivided carpus divided from propodus (2-articulated) by an oblique articulation (Fig. | | | Male pleopods 2-5 well developed and biramous (Fig. | | | Male pleopods 2-5 usually well developed and biramous (Fig. |
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http://tidepool.st.usm.edu/mysids/mysinae.html
(276 words)
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| | CYPRIS No. 17 (1999) Abstracts |
| | Unambiguously biramous appendages with a proximal precoxa, well defined coxa and basis, setose plate-like epipod originating on the precoxa, and both an endopod and exopod attached to the terminal end of the basis are described from several living Ostracoda of the order Halocyprida (Myodocopa). | | | No living ostracodes exhibit only primitive morphology; all have at least some (usually many) derived characters. | | | These limbs are proposed as the best choice for comparison of ostracode limbs with those of other crustaceans and 'Lagerstätten' fossil arthropods with preserved limbs, such as the Cambrian superficially ostracode-like Kunmingella (recently redescribed) and Hesslandona. |
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http://biology.usgs.gov/cro/Ostracode/Cyp99/99cyabst.htm
(891 words)
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| | Palaeos Ecology : Radiations : Cambrian Explosion |
| | About ten limbs appear to have been present, which may have been biramous. | | | The central axial ridge and the strongly arched anterior 'lobes' may be analogous to the midgut and gastric diverticulae which occur in the Burgess Shale arthropod Bugressia. |
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http://www.palaeos.com/Ecology/Radiations/CambrianExplosion.html
(4187 words)
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| | Arthropoda |
| | Locomotion commonly by lever action (unlike hydraulic action as in annelids). | | | One preoral appendage pair; one pair of weak gnathobases postorally; long series of biramous, postoral appendages; mandibles and chelae absent. | | | Body divided into distinct tagma: cephalon, thorax, pygidium. |
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http://www.ualr.edu/~ersc/Paleontology/Arthropoda.html
(472 words)
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| | Reading notes for arthropods |
| | The text uses a modification of the multiple phylum approach of Manton (1973, 1977). | | | Phylum Crustacea - 5 uniramous appendages on head (2 antenna pairs in front of mouth, 3 feeding pairs behind mouth), rest are biramous. | | | Although not discussed in Clarkson to any extent, the number, type and placement (relative to the mouth and segmentation) of the appendages serves to divide the major groups of arthropods (see notes below). |
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http://www.uwm.edu/People/mtharris/Paleo2002/RN20.htm
(898 words)
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| | Appendages (from crustacean) -- Encyclopædia Britannica |
| | Form and function of external features > Appendages | | | There is great diversity among the appendages of the Crustacea, but it is thought that all the different types can be derived either from the multibranched (multiramous) limb of the class Cephalocarida or from the double-branched (biramous) limb of the class Remipedia. | | | A biramous limb typically has a basal part, or protopodite, bearing two branches, an inner endopodite… |
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http://www.britannica.com/eb/article-33804
(723 words)
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| | Lecture 7 |
| | appendages biramous (except for the first pair of antennae and derived forms) | | | B. Form and Function - Crayfish as example (f9g 20-2, p 385 | | | The biramous limb may have arisen from fusion of two segments, each with a uniramous limb. |
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http://nas.cl.uh.edu/novotny/amh07.htm
(1284 words)
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| | Crustacea |
| | Characterized morphologically by two pairs of antennae in front of the mouth and one pair of mandibles behind mouth. | | | Primitive members with biramous appendages, others secondarily uniramous and /or highly specialized. | | | Abdominal limbs, known as pleopods, typically serve the function of locomotion; they are biramous swimming appendages (Moore, 1969). |
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http://www.cox-internet.com/coop/crustacea.html
(1602 words)
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| | Mysidacea: Families, Subfamilies and Tribes - Siriellinae |
| | 1st pair biramous, or endopod reduced (as in Siriella armata); 2nd pair biramous; 3rd pair biramous; 4th pair biramous; 5th pair biramous. | | | The tribe Metasiriellini consists of the species Metasiriella kitaroi Murano, 1986 and is diagnosed by the reduction of the first, second, third, and fifth male pleopods, and a fourth biramous pleopod with a uniramous and pseudobranchial lobe on the basal segment of the endopod. | | | The tribe Siriellini contains Hemisiriella Hansen, 1910 and Siriella Dana, 1850 and diagnosed by the male pleopods with a spirally coiled or straight pseudobranchial lobe on the basal segment of the endopod. |
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http://www.crustacea.net/crustace/mysidacea/www/sirriell.htm
(279 words)
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| | [No title] |
| | The body is divided into a 5-segmented head, a 7-8 segmented thorax and a 6-segmented abdomen. | | | Unlike in the other malacostracan orders Decapoda, Amphipoda and Isopoda, the foremost thoracic legs are never modified as gnathopods. | | | The antennules are biramous with both branches linear, the antennal expodites are scale-like. |
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http://lucidcentral.com/keys/lwrrdc/public/aquatics/adcrust/html/SYNCARID.htm
(165 words)
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| | Marine Biology - Euphausiids |
| | Phylum Arthropoda: segmented bilaterally symmetrical animals in which some or all segments typically bear a pair of jointed, originally two-branched ('biramous'), appendages and in which the body and appendage segments are covered with an articulating chitinous exoskeleton; growth by moulting of the exoskeleton; | | | Three species of euphausiid reproduce in Scottish waters: Nyctiphanes couchii, Meganyticiphanes norvegia and Thysanoessa raschii. |
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http://www.lifesciences.napier.ac.uk/teaching/MB/Euphausiid02.html
(1684 words)
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| | Trilobite |
| | Perhaps a good high-resolution view of a biramous limb will make apparent to me what I ought to do to get the trilobite legs to look correct.... | | | I'll have to take into account triops' adaptations for low oxygen, high-temperature water, but I still think the gill surfaces of my trilobite oughta be bigger....Sometime in the next few days, I'm going to haul out the microscope and do some sketches of the limbs of my preserved triops. | | | Approx 2MB,.mov format, Sorensen 3 compression, Quicktime 5 or better required |
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http://www.nickjainschigg.org/Trilobite.html
(1491 words)
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| | biramous : Definition |
| | Search for biramous in these other databases too |
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http://www.everythingbio.com/glos/definition.php?word=biramous
(99 words)
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| | MSN Encarta - Dictionary - biramous |
| | Click here to search all of MSN Encarta | | | Search for "biramous" in all of MSN Encarta |
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http://encarta.msn.com/dictionary_1861590716_1861590702/prevpage.html
(38 words)
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